This week's Humble Weekly sale is all about being cooperative. The Humble Co-op Weekly Bundle offers the multiplayer action platformer Awesomenauts, the FPS and tower defense hybrid, Sanctum 2, and the fantasy arcade action RPG, Wanderlust: Rebirth - all for whatever you want to pay.
If you pay $6 or more you'll also receive platformer game Rocketbirds: Hardboiled Chicken, tower-defense strategy game sequel Orcs Must Die! 2 Complete Pack, and the free-form aerial beat 'em-up, Aces Wild: Manic Brawling Action!.
Paying $10 or more will grant you all of the titles above, along with the roguelike action platformer, Risk of Rain.
Pay $17 or more to get a second copy of every game in this weekly bundle, and if you pay $30 or more and you'll have four copies of each game for you and three of your friends to play.
The charities of note this week are the American Red Cross and Child's Play.
You can find out more about the bundle at www.humblebundle.com/weekly.